docs: def basic_decrypt() -> Response:
      """Basic decrypt handler for decrypt oracle v0.
  
      **Request**
  
      * **Method**: POST
      * **Body**: Raw ciphertext bytes
      * **Headers**:
  
        * **Content-Type**: ``application/octet-stream``
        * **Accept**: ``application/octet-stream``
  
      **Response**
  
      * 200 response code with the raw plaintext bytes as the body
      * 400 response code with whatever error code was encountered as the body
      """
      APP.log.debug("Request:")
      APP.log.debug(json.dumps(APP.current_request.to_dict()))
      APP.log.debug("Ciphertext:")
      APP.log.debug(APP.current_request.raw_body)
  
      try:
          ciphertext = APP.current_request.raw_body
          plaintext, _header = aws_encryption_sdk.decrypt(source=ciphertext, key_provider=_master_key_provider())
          APP.log.debug("Plaintext:")
          APP.log.debug(plaintext)
          response = Response(body=plaintext, headers={"Content-Type": "application/octet-stream"}, status_code=200)
      except Exception as error:  # pylint: disable=broad-except
          response = Response(body=str(error), status_code=400)
  
      APP.log.debug("Response:")
      APP.log.debug(json.dumps(response.to_dict(binary_types=["application/octet-stream"])))
      return response